#57 in the George Cukor filmography.
Although the role of the dotty Aunt Augusta was originally set for Katharine Hepburn, a long-time collaborator of director George Cukor, it would be 36-year old Maggie Smith who appeared in front of the camera in this sprightly adaptation of Graham Greene's novel.
Her larger than life character makes mincemeat of her nervous nephew Henry (Alec McCowen, aged 45) as they head on a trip together which pulls him into the weird worlds of smuggling, kidnapping, and bribery. Joining them is Augusta's current beau, the drug-addled Wordsworth (Louis Gossett Jr).
Their travels are hugely diverting and rather bizarre, and Smith, McCowen, and Gossett are an excellent team, especially as Augusta leads her nephew to the dark side. Robert Stephens, then married to Smith, makes a great snake in the grass.